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Summary: Nested Classes | Ctors | Methods | Inherited Methods

# WebChromeClient

`public class WebChromeClient`
`extends Object` ``

java.lang.Object
↳ | android.webkit.WebChromeClient

## Summary

### Nested classes
`interface` | `WebChromeClient.CustomViewCallback` A callback interface used by the host application to notify the current page that its custom view has been dismissed.
`class` | `WebChromeClient.FileChooserParams` Parameters used in the `WebChromeClient.onShowFileChooser(WebView, ValueCallback, WebChromeClient.FileChooserParams)` method.

### Public constructors
`WebChromeClient()`

### Public methods
`Bitmap` | `getDefaultVideoPoster()` When not playing, video elements are represented by a 'poster' image.
`View` | `getVideoLoadingProgressView()` Obtains a View to be displayed while buffering of full screen video is taking place.
`void` | `getVisitedHistory(ValueCallback<String[]> callback)` Obtains a list of all visited history items, used for link coloring
`void` | `onCloseWindow(WebView window)` Notify the host application to close the given WebView and remove it from the view system if necessary.
`boolean` | `onConsoleMessage(ConsoleMessage consoleMessage)` Report a JavaScript console message to the host application.
`void` | `onConsoleMessage(String message, int lineNumber, String sourceID)` This method is deprecated. Use `onConsoleMessage(ConsoleMessage)` instead.
`boolean` | `onCreateWindow(WebView view, boolean isDialog, boolean isUserGesture, Message resultMsg)` Request the host application to create a new window.
`void` | `onExceededDatabaseQuota(String url, String databaseIdentifier, long quota, long estimatedDatabaseSize, long totalQuota, WebStorage.QuotaUpdater quotaUpdater)` This method is deprecated. This method is no longer called; WebView now uses the HTML5 / JavaScript Quota Management API.
`void` | `onGeolocationPermissionsHidePrompt()` Notify the host application that a request for Geolocation permissions, made with a previous call to `onGeolocationPermissionsShowPrompt()` has been canceled.
`void` | `onGeolocationPermissionsShowPrompt(String origin, GeolocationPermissions.Callback callback)` Notify the host application that web content from the specified origin is attempting to use the Geolocation API, but no permission state is currently set for that origin.
`void` | `onHideCustomView()` Notify the host application that the current page has exited full screen mode.
`boolean` | `onJsAlert(WebView view, String url, String message, JsResult result)` Notify the host application that the web page wants to display a JavaScript `alert()` dialog.
`boolean` | `onJsBeforeUnload(WebView view, String url, String message, JsResult result)` Notify the host application that the web page wants to confirm navigation from JavaScript `onbeforeunload`.
`boolean` | `onJsConfirm(WebView view, String url, String message, JsResult result)` Notify the host application that the web page wants to display a JavaScript `confirm()` dialog.
`boolean` | `onJsPrompt(WebView view, String url, String message, String defaultValue, JsPromptResult result)` Notify the host application that the web page wants to display a JavaScript `prompt()` dialog.
`boolean` | `onJsTimeout()` This method is deprecated. This method is no longer supported and will not be invoked.
`void` | `onPermissionRequest(PermissionRequest request)` Notify the host application that web content is requesting permission to access the specified resources and the permission currently isn't granted or denied.
`void` | `onPermissionRequestCanceled(PermissionRequest request)` Notify the host application that the given permission request has been canceled.
`void` | `onProgressChanged(WebView view, int newProgress)` Tell the host application the current progress of loading a page.
`void` | `onReachedMaxAppCacheSize(long requiredStorage, long quota, WebStorage.QuotaUpdater quotaUpdater)` This method is deprecated. This method is no longer called; WebView now uses the HTML5 / JavaScript Quota Management API.
`void` | `onReceivedIcon(WebView view, Bitmap icon)` Notify the host application of a new favicon for the current page.
`void` | `onReceivedTitle(WebView view, String title)` Notify the host application of a change in the document title.
`void` | `onReceivedTouchIconUrl(WebView view, String url, boolean precomposed)` Notify the host application of the url for an apple-touch-icon.
`void` | `onRequestFocus(WebView view)` Request display and focus for this WebView.
`void` | `onShowCustomView(View view, int requestedOrientation, WebChromeClient.CustomViewCallback callback)` This method is deprecated. This method supports the obsolete plugin mechanism, and will not be invoked in future
`void` | `onShowCustomView(View view, WebChromeClient.CustomViewCallback callback)` Notify the host application that the current page has entered full screen mode.
`boolean` | `onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams)` Tell the client to show a file chooser.

### Inherited methods
From class `java.lang.Object`
`Object` | `clone()` Creates and returns a copy of this object.
`boolean` | `equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void` | `finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>` | `getClass()` Returns the runtime class of this `Object`.
`int` | `hashCode()` Returns a hash code value for the object.
`final void` | `notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void` | `notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String` | `toString()` Returns a string representation of the object.
`final void` | `wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void` | `wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void` | `wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

## Public constructors

### WebChromeClient

    public WebChromeClient ()

## Public methods

### getDefaultVideoPoster

    public Bitmap getDefaultVideoPoster ()

When not playing, video elements are represented by a 'poster' image. The image to use can be specified by the poster attribute of the video tag in HTML. If the attribute is absent, then a default poster will be used. This method allows the ChromeClient to provide that default image.

Returns
`Bitmap` | Bitmap The image to use as a default poster, or `null` if no such image is available.

### getVideoLoadingProgressView

    public View getVideoLoadingProgressView ()

Obtains a View to be displayed while buffering of full screen video is taking place. The host application can override this method to provide a View containing a spinner or similar.

Returns
`View` | View The View to be displayed whilst the video is loading. This value may be `null`.

### getVisitedHistory

    public void getVisitedHistory (ValueCallback<String[]> callback)

Obtains a list of all visited history items, used for link coloring

Parameters
`callback` | `ValueCallback`

### onCloseWindow

    public void onCloseWindow (WebView window)

Notify the host application to close the given WebView and remove it from the view system if necessary. At this point, WebCore has stopped any loading in this window and has removed any cross-scripting ability in javascript.

As with `onCreateWindow(WebView, boolean, boolean, Message)`, the application should ensure that any URL or security indicator displayed is updated so that the user can tell that the page they were interacting with has been closed.

Parameters
`window` | `WebView`: The WebView that needs to be closed.

### onConsoleMessage

    public boolean onConsoleMessage (ConsoleMessage consoleMessage)

Report a JavaScript console message to the host application. The ChromeClient should override this to process the log message as they see fit.

Parameters
`consoleMessage` | `ConsoleMessage`: Object containing details of the console message.

Returns
`boolean` | `true` if the message is handled by the client.

### onConsoleMessage

    public void onConsoleMessage (String message,
                    int lineNumber,
                    String sourceID)

This method is deprecated.
Use `onConsoleMessage(ConsoleMessage)` instead.

Report a JavaScript error message to the host application. The ChromeClient should override this to process the log message as they see fit.

Parameters
`message` | `String`: The error message to report.
`lineNumber` | `int`: The line number of the error.
`sourceID` | `String`: The name of the source file that caused the error.

### onCreateWindow

    public boolean onCreateWindow (WebView view,
                    boolean isDialog,
                    boolean isUserGesture,
                    Message resultMsg)

Request the host application to create a new window. If the host application chooses to honor this request, it should return `true` from this method, create a new WebView to host the window, insert it into the View system and send the supplied resultMsg message to its target with the new WebView as an argument. If the host application chooses not to honor the request, it should return `false` from this method. The default implementation of this method does nothing and hence returns `false`.

Applications should typically not allow windows to be created when the `isUserGesture` flag is false, as this may be an unwanted popup.

Applications should be careful how they display the new window: don't simply overlay it over the existing WebView as this may mislead the user about which site they are viewing. If your application displays the URL of the main page, make sure to also display the URL of the new window in a similar fashion. If your application does not display URLs, consider disallowing the creation of new windows entirely.

Note: There is no trustworthy way to tell which page requested the new window: the request might originate from a third-party iframe inside the WebView.

Parameters
`view` | `WebView`: The WebView from which the request for a new window originated.
`isDialog` | `boolean`: `true` if the new window should be a dialog, rather than a full-size window.
`isUserGesture` | `boolean`: `true` if the request was initiated by a user gesture, such as the user clicking a link.
`resultMsg` | `Message`: The message to send when once a new WebView has been created. resultMsg.obj is a `WebView.WebViewTransport` object. This should be used to transport the new WebView, by calling `WebView.WebViewTransport#setWebView(WebView)`.

Returns
`boolean` | This method should return `true` if the host application will create a new window, in which case resultMsg should be sent to its target. Otherwise, this method should return `false`. Returning `false` from this method but also sending resultMsg will result in undefined behavior.

### onExceededDatabaseQuota

    public void onExceededDatabaseQuota (String url,
                    String databaseIdentifier,
                    long quota,
                    long estimatedDatabaseSize,
                    long totalQuota,
                    WebStorage.QuotaUpdater quotaUpdater)

This method is deprecated.
This method is no longer called; WebView now uses the HTML5 / JavaScript Quota Management API.

Tell the client that the quota has been exceeded for the Web SQL Database API for a particular origin and request a new quota. The client must respond by invoking the `WebStorage.QuotaUpdater#updateQuota(long)` method of the supplied `WebStorage.QuotaUpdater` instance. The minimum value that can be set for the new quota is the current quota. The default implementation responds with the current quota, so the quota will not be increased.

Parameters
`url` | `String`: The URL of the page that triggered the notification
`databaseIdentifier` | `String`: The identifier of the database where the quota was exceeded.
`quota` | `long`: The quota for the origin, in bytes
`estimatedDatabaseSize` | `long`: The estimated size of the offending database, in bytes
`totalQuota` | `long`: The total quota for all origins, in bytes
`quotaUpdater` | `WebStorage.QuotaUpdater`: An instance of `WebStorage.QuotaUpdater` which must be used to inform the WebView of the new quota.

### onGeolocationPermissionsHidePrompt

    public void onGeolocationPermissionsHidePrompt ()

Notify the host application that a request for Geolocation permissions, made with a previous call to `onGeolocationPermissionsShowPrompt()` has been canceled. Any related UI should therefore be hidden.

### onGeolocationPermissionsShowPrompt

    public void onGeolocationPermissionsShowPrompt (String origin,
                    GeolocationPermissions.Callback callback)

Notify the host application that web content from the specified origin is attempting to use the Geolocation API, but no permission state is currently set for that origin. The host application should invoke the specified callback with the desired permission state. See `GeolocationPermissions` for details.

Note that for applications targeting Android N and later SDKs (API level > `Build.VERSION_CODES.M`) this method is only called for requests originating from secure origins such as https. On non-secure origins geolocation requests are automatically denied.

Parameters
`origin` | `String`: The origin of the web content attempting to use the Geolocation API.
`callback` | `GeolocationPermissions.Callback`: The callback to use to set the permission state for the origin.

### onHideCustomView

    public void onHideCustomView ()

Notify the host application that the current page has exited full screen mode. The host application must hide the custom View (the View which was previously passed to `onShowCustomView()`). After this call, web content will render in the original WebView again.

Note: if overriding this method, the application must also override `onShowCustomView()`.

### onJsAlert

    public boolean onJsAlert (WebView view,
                    String url,
                    String message,
                    JsResult result)

Notify the host application that the web page wants to display a JavaScript `alert()` dialog.

The default behavior if this method returns `false` or is not overridden is to show a dialog containing the alert message and suspend JavaScript execution until the dialog is dismissed.

To show a custom dialog, the app should return `true` from this method, in which case the default dialog will not be shown and JavaScript execution will be suspended. The app should call `JsResult.confirm()` when the custom dialog is dismissed such that JavaScript execution can be resumed.

To suppress the dialog and allow JavaScript execution to continue, call `JsResult.confirm()` immediately and then return `true`.

Note that if the `WebChromeClient` is set to be `null`, or if `WebChromeClient` is not set at all, the default dialog will be suppressed and Javascript execution will continue immediately.

Note that the default dialog does not inherit the `Display.FLAG_SECURE` flag from the parent window.

Parameters
`view` | `WebView`: The WebView that initiated the callback.
`url` | `String`: The url of the page requesting the dialog.
`message` | `String`: Message to be displayed in the window.
`result` | `JsResult`: A JsResult to confirm that the user closed the window.

Returns
`boolean` | boolean `true` if the request is handled or ignored. `false` if WebView needs to show the default dialog.

### onJsBeforeUnload

    public boolean onJsBeforeUnload (WebView view,
                    String url,
                    String message,
                    JsResult result)

Notify the host application that the web page wants to confirm navigation from JavaScript `onbeforeunload`.

The default behavior if this method returns `false` or is not overridden is to show a dialog containing the message and suspend JavaScript execution until the dialog is dismissed. The default dialog will continue the navigation if the user confirms the navigation, and will stop the navigation if the user wants to stay on the current page.

To show a custom dialog, the app should return `true` from this method, in which case the default dialog will not be shown and JavaScript execution will be suspended. When the custom dialog is dismissed, the app should call `JsResult.confirm()` to continue the navigation or, `JsResult.cancel()` to stay on the current page.

To suppress the dialog and allow JavaScript execution to continue, call `JsResult.confirm()` or `JsResult.cancel()` immediately and then return `true`.

Note that if the `WebChromeClient` is set to be `null`, or if `WebChromeClient` is not set at all, the default dialog will be suppressed and the navigation will be resumed immediately.

Note that the default dialog does not inherit the `Display.FLAG_SECURE` flag from the parent window.

Parameters
`view` | `WebView`: The WebView that initiated the callback.
`url` | `String`: The url of the page requesting the dialog.
`message` | `String`: Message to be displayed in the window.
`result` | `JsResult`: A JsResult used to send the user's response to javascript.

Returns
`boolean` | boolean `true` if the request is handled or ignored. `false` if WebView needs to show the default dialog.

### onJsConfirm

    public boolean onJsConfirm (WebView view,
                    String url,
                    String message,
                    JsResult result)

Notify the host application that the web page wants to display a JavaScript `confirm()` dialog.

The default behavior if this method returns `false` or is not overridden is to show a dialog containing the message and suspend JavaScript execution until the dialog is dismissed. The default dialog will return `true` to the JavaScript `confirm()` code when the user presses the 'confirm' button, and will return `false` to the JavaScript code when the user presses the 'cancel' button or dismisses the dialog.

To show a custom dialog, the app should return `true` from this method, in which case the default dialog will not be shown and JavaScript execution will be suspended. The app should call `JsResult.confirm()` or `JsResult.cancel()` when the custom dialog is dismissed.

To suppress the dialog and allow JavaScript execution to continue, call `JsResult.confirm()` or `JsResult.cancel()` immediately and then return `true`.

Note that if the `WebChromeClient` is set to be `null`, or if `WebChromeClient` is not set at all, the default dialog will be suppressed and the default value of `false` will be returned to the JavaScript code immediately.

Note that the default dialog does not inherit the `Display.FLAG_SECURE` flag from the parent window.

Parameters
`view` | `WebView`: The WebView that initiated the callback.
`url` | `String`: The url of the page requesting the dialog.
`message` | `String`: Message to be displayed in the window.
`result` | `JsResult`: A JsResult used to send the user's response to javascript.

Returns
`boolean` | boolean `true` if the request is handled or ignored. `false` if WebView needs to show the default dialog.

### onJsPrompt

    public boolean onJsPrompt (WebView view,
                    String url,
                    String message,
                    String defaultValue,
                    JsPromptResult result)

Notify the host application that the web page wants to display a JavaScript `prompt()` dialog.

The default behavior if this method returns `false` or is not overridden is to show a dialog containing the message and suspend JavaScript execution until the dialog is dismissed. Once the dialog is dismissed, JavaScript `prompt()` will return the string that the user typed in, or null if the user presses the 'cancel' button.

To show a custom dialog, the app should return `true` from this method, in which case the default dialog will not be shown and JavaScript execution will be suspended. The app should call `JsPromptResult.confirm(result)` when the custom dialog is dismissed.

To suppress the dialog and allow JavaScript execution to continue, call `JsPromptResult.confirm(result)` immediately and then return `true`.

Note that if the `WebChromeClient` is set to be `null`, or if `WebChromeClient` is not set at all, the default dialog will be suppressed and `null` will be returned to the JavaScript code immediately.

Note that the default dialog does not inherit the `Display.FLAG_SECURE` flag from the parent window.

Parameters
`view` | `WebView`: The WebView that initiated the callback.
`url` | `String`: The url of the page requesting the dialog.
`message` | `String`: Message to be displayed in the window.
`defaultValue` | `String`: The default value displayed in the prompt dialog.
`result` | `JsPromptResult`: A JsPromptResult used to send the user's reponse to javascript.

Returns
`boolean` | boolean `true` if the request is handled or ignored. `false` if WebView needs to show the default dialog.

### onJsTimeout

    public boolean onJsTimeout ()

This method is deprecated.
This method is no longer supported and will not be invoked.

Tell the client that a JavaScript execution timeout has occured. And the client may decide whether or not to interrupt the execution. If the client returns `true`, the JavaScript will be interrupted. If the client returns `false`, the execution will continue. Note that in the case of continuing execution, the timeout counter will be reset, and the callback will continue to occur if the script does not finish at the next check point.

Returns
`boolean` | boolean Whether the JavaScript execution should be interrupted.

### onPermissionRequest

    public void onPermissionRequest (PermissionRequest request)

Notify the host application that web content is requesting permission to access the specified resources and the permission currently isn't granted or denied. The host application must invoke `PermissionRequest#grant(String[])` or `PermissionRequest#deny()`. If this method isn't overridden, the permission is denied.

Parameters
`request` | `PermissionRequest`: the PermissionRequest from current web content.

### onPermissionRequestCanceled

    public void onPermissionRequestCanceled (PermissionRequest request)

Notify the host application that the given permission request has been canceled. Any related UI should therefore be hidden.

Parameters
`request` | `PermissionRequest`: the PermissionRequest that needs be canceled.

### onProgressChanged

    public void onProgressChanged (WebView view,
                    int newProgress)

Tell the host application the current progress of loading a page.

Parameters
`view` | `WebView`: The WebView that initiated the callback.
`newProgress` | `int`: Current page loading progress, represented by an integer between 0 and 100.

### onReachedMaxAppCacheSize

    public void onReachedMaxAppCacheSize (long requiredStorage,
                    long quota,
                    WebStorage.QuotaUpdater quotaUpdater)

This method is deprecated.
This method is no longer called; WebView now uses the HTML5 / JavaScript Quota Management API.

Notify the host application that the Application Cache has reached the maximum size. The client must respond by invoking the `WebStorage.QuotaUpdater#updateQuota(long)` method of the supplied `WebStorage.QuotaUpdater` instance. The minimum value that can be set for the new quota is the current quota. The default implementation responds with the current quota, so the quota will not be increased.

Parameters
`requiredStorage` | `long`: The amount of storage required by the Application Cache operation that triggered this notification, in bytes.
`quota` | `long`: the current maximum Application Cache size, in bytes
`quotaUpdater` | `WebStorage.QuotaUpdater`: An instance of `WebStorage.QuotaUpdater` which must be used to inform the WebView of the new quota.

### onReceivedIcon

    public void onReceivedIcon (WebView view,
                    Bitmap icon)

Notify the host application of a new favicon for the current page.

Parameters
`view` | `WebView`: The WebView that initiated the callback.
`icon` | `Bitmap`: A Bitmap containing the favicon for the current page.

### onReceivedTitle

    public void onReceivedTitle (WebView view,
                    String title)

Notify the host application of a change in the document title.

Parameters
`view` | `WebView`: The WebView that initiated the callback.
`title` | `String`: A String containing the new title of the document.

### onReceivedTouchIconUrl

    public void onReceivedTouchIconUrl (WebView view,
                    String url,
                    boolean precomposed)

Notify the host application of the url for an apple-touch-icon.

Parameters
`view` | `WebView`: The WebView that initiated the callback.
`url` | `String`: The icon url.
`precomposed` | `boolean`: `true` if the url is for a precomposed touch icon.

### onRequestFocus

    public void onRequestFocus (WebView view)

Request display and focus for this WebView. This may happen due to another WebView opening a link in this WebView and requesting that this WebView be displayed.

Parameters
`view` | `WebView`: The WebView that needs to be focused.

### onShowCustomView

    public void onShowCustomView (View view,
                    int requestedOrientation,
                    WebChromeClient.CustomViewCallback callback)

This method is deprecated.
This method supports the obsolete plugin mechanism, and will not be invoked in future

Notify the host application that the current page would like to show a custom View in a particular orientation.

Parameters
`view` | `View`: is the View object to be shown.
`requestedOrientation` | `int`: An orientation constant as used in `ActivityInfo#screenOrientation`.
`callback` | `WebChromeClient.CustomViewCallback`: is the callback to be invoked if and when the view is dismissed.

### onShowCustomView

    public void onShowCustomView (View view,
                    WebChromeClient.CustomViewCallback callback)

Notify the host application that the current page has entered full screen mode. After this call, web content will no longer be rendered in the WebView, but will instead be rendered in `view`. The host application should add this View to a Window which is configured with `WindowManager.LayoutParams.FLAG_FULLSCREEN` flag in order to actually display this web content full screen.

The application may explicitly exit fullscreen mode by invoking `callback` (ex. when the user presses the back button). However, this is generally not necessary as the web page will often show its own UI to close out of fullscreen. Regardless of how the WebView exits fullscreen mode, WebView will invoke `onHideCustomView()`, signaling for the application to remove the custom View.

If this method is not overridden, WebView will report to the web page it does not support fullscreen mode and will not honor the web page's request to run in fullscreen mode.

Note: if overriding this method, the application must also override `onHideCustomView()`.

Parameters
`view` | `View`: is the View object to be shown.
`callback` | `WebChromeClient.CustomViewCallback`: invoke this callback to request the page to exit full screen mode.

### onShowFileChooser

    public boolean onShowFileChooser (WebView webView,
                    ValueCallback<Uri[]> filePathCallback,
                    WebChromeClient.FileChooserParams fileChooserParams)

Tell the client to show a file chooser. This is called to handle HTML forms with 'file' input type, in response to the user pressing the "Select File" button. To cancel the request, call `filePathCallback.onReceiveValue(null)` and return `true`.

Parameters
`webView` | `WebView`: The WebView instance that is initiating the request.
`filePathCallback` | `ValueCallback`: Invoke this callback to supply the list of paths to files to upload, or `null` to cancel. Must only be called if the `onShowFileChooser(WebView, ValueCallback, WebChromeClient.FileChooserParams)` implementation returns `true`.
`fileChooserParams` | `WebChromeClient.FileChooserParams`: Describes the mode of file chooser to be opened, and options to be used with it.

Returns
`boolean` | `true` if filePathCallback will be invoked, `false` to use default handling.

See also:

- `WebChromeClient.FileChooserParams`

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